# たらいいですか: what should I do > Learn how to use たらいいですか, a JLPT N4 Japanese grammar point meaning what should I do, with structure, nuance, examples, mistakes, and comparisons. JLPT level: N4 · Updated: 2026-05-17 · Canonical: https://hane-app.com/blog/n4-tara-ii-desu-ka/ **たらいいですか** means **what should I do**. It is a **JLPT N4** Japanese grammar pattern used to express this idea in natural Japanese. This English meaning is written independently from the source list so it answers the learner question directly: what does **たらいいですか** mean and when should you use it?
たらいいですか is the natural way to ask “what should I do?” in Japanese by attaching to the た-form of any verb.
## What does たらいいですか mean? Use **たらいいですか** when you want to express **what should I do** in a Japanese sentence. Natural translations include: - what should I do - to express “what should I do” naturally - the closest natural English meaning in context ## How to form たらいいですか
Question word + verb (た-form) + らいいですか
Examples of the pattern: - どこで買かったらいいですか - 何なにを持もって行いったらいいですか - 誰だれに聞きいたらいいですか Related form: **ばいいですか**
!
The verb must be in the た-form before adding ら. Do not use the dictionary form or the て-form here.
## When is たらいいですか used? Use **たらいいですか** in situations like: - reading or writing JLPT N4-level sentences - making a sentence more precise than a basic N5 pattern - recognizing natural grammar in conversation or short passages Tone and register: - usually neutral unless the pattern itself is casual, humble, honorific, or written - common in JLPT N4 grammar study and everyday examples ## たらいいですか example sentences
どこで切符きっぷを買かったらいいですか。
Where should I buy a ticket?
N4 question
何なにを持もって行いったらいいですか。
What should I bring?
N4 question
誰だれに聞きいたらいいですか。
Who should I ask?
N4 question
この漢字かんじはどう読よんだらいいですか。
How should I read this kanji?
N4 question
駅えきまでどう行ったらいいですか。
How should I get to the station?
N4 question
After reading each sentence, notice how the question word (where, what, who, how) changes the specific meaning while the grammar pattern stays the same. ## Nuance of たらいいですか The key nuance is **what should I do in context**, not a word-for-word English replacement. This matters because **たらいいですか** often changes the relationship between actions, people, time, or evidence in the sentence. Read the whole sentence before choosing the English translation. ## たらいいですか vs ばいいですか Both patterns can appear in related sentences, but they do different jobs.
たらいいですか
Focuses on what should I do with a softer, more exploratory tone.
どこで切符きっぷを買かったらいいですか。
Where should I buy a ticket?
vs
ばいいですか
A related pattern that may change the tone, evidence, direction, or relationship in the sentence.
何なにをすればいいですか。
What should I do? (different nuance and verb form)
If both translations seem possible, check the verb form. **たらいいですか** requires the た-form, while **ばいいですか** requires the ば-form. ## Common mistakes with たらいいですか
❌
Translating たらいいですか as a fixed phrase without checking the surrounding context.
✅
Read the whole sentence first; the question word determines whether it means where, what, or how.
Copying a dictionary gloss without checking the sentence context leads to awkward translations.
❌
どこで切符きっぷを買かるらいいですか。
✅
どこで切符きっぷを買かったらいいですか。
Using the plain form instead of the た-form before らいいですか.
❌
Confusing たらいいですか with ばいいですか only because the English sounds similar.
✅
たらいいですか uses the た-form + ら; ばいいですか uses the ば-form. Choose based on the required conjugation.
The two patterns attach to different verb forms, so the grammar structure itself tells you which one to use.
## Is たらいいですか on the JLPT?
N4

たらいいですか is a core JLPT N4 pattern.

✓ Recognize it in reading and listening
✓ Understand how the question word shifts the meaning
✓ Use it in simple original sentences
For test preparation, study the grammar point in full sentences. JLPT questions often test whether you understand the surrounding context, not just the dictionary meaning. ## Practice questions for たらいいですか
1
Write one short sentence using the basic structure.
production
2
Replace the subject, time, or object and keep the same grammar point.
variation
3
Compare your sentence with the related pattern ばいいですか and note the verb-form difference.
comparison
Keep your first sentences simple. Once the structure feels natural, add more context so the nuance becomes clear. ## Learning path for たらいいですか
1
Memorize the formation: question word + verb た-form + らいいですか.
2
Review the level of pressure in たらいいですか: necessity, prohibition, command, request, or advice.
3
Compare it with ばいいですか so you know which verb form each pattern requires.
4
Write one sentence that uses たらいいですか in its most literal meaning, one that changes the subject or time expression, and one that contrasts it with an obligation pattern.
## Related grammar to review next - [必要がある](/blog/n4-hitsuyou-ga-aru/) — shows a nearby level of obligation, command, advice, or request strength. - [が必要](/blog/n4-ga-hitsuyou/) — shows a nearby level of obligation, command, advice, or request strength. - [な](/blog/n4-na/) — shows a nearby level of obligation, command, advice, or request strength. - [なさい](/blog/n4-nasai/) — shows a nearby level of obligation, command, advice, or request strength. ## Learn たらいいですか with Hane If you want to review **たらいいですか** together with the related patterns above, Hane helps you practice Japanese in short, focused sessions. Browse more lessons here: - [All grammar lessons](/blog/) - [JLPT N4 grammar lessons](/blog/n4/)